It's about three years since I was shown the Bluebell Woods and every year at this time I think about going there. I didn't pay very close attention to how you got there so it was an adventure! You know, the sort where you go: "Come on! I'm sure it's down this little road," and a rearguard of piglets squeals reluctantly along saying they want to go home, LOL.
Actually the way to get there is a not very visible footpath on the North-Eastern side, close to the roundabout at the junction of Rhiwbina Hill and Pantmawr Road. The path runs down to a footbridge over a stream. Opposite is a lovely hillside just made for dog walking and picnics. (This is not a wheelchair accessible walk, and best done with children who no longer need a pushchair.)